Ewrb - Study guides, Class notes & Summaries

EWRB Theory Prep – MCBs Exam Questions And Answers types of MCB trips - ANS-thermal magnetic thermal tripping - ANS-bi-metal strip, used for overload currents protection magnetic tripping - ANS-magnetic inductor, used for short circuit protection reset procedure - ANS-reset to OFF reset to ON arc containment includes - ANS-horns carry current to chute, allow arc to jump out arc chute lengthens distance for arc to travel oil suppresses arc splitter plates split the arc arc...

Ewrb Theory Exam Prep Questions With Correct Detailed Answers 2024.

EWRB Theory Exam Prep With complete solution Newest 2024/25 RATED A+

What is the minimum value of the permitted test result for the insulation resistance test of a three-phase, 400V, mains cable? - ANSWER 1MΩ When carrying out testing on a low voltage electrical installation, which document details the tests and checks required to be carried out? - ANSWER AS/NZS 3000 What is the minimum or maximum test result value you would consider acceptable for an Earth Continuity test? - ANSWER 1Ω or less

EWRB EXAM 49 QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS GRADED A++ State the main reason why a large industrial electrical installation has a higher prospective short circuit current (PSSC) than a domestic electrical installation. The fault loop impedance is lower Because the distribution transformer is close to the installation or on-site A CT metering circuit is measuring the consumption of an industrial electrical installation at near to full load. The CT secondary must be shortcircu...

EWRB THEORY EXAM PREP (2024) LATEST QUESTIONS & ANSWERS VERIFIED 100% CORRECT!!

Question 1: A new flexible chord has been fitted, which of the following insolation resistance test values would be correct? A. 10 MOhm B. 0.5 Ohm C. 0.5 MOhm D. 1. Ohm - ANSWER ☑☑A. 10 MOhm Question 2: The maximum current a flexible cord can carry safely without overheating depends mainly on: A. The type of supply, a.c. or d.c. B. The cross-sectional area of the flexible cord conductors. C. The colours of the flexible cord conductors. D. The number of cores in the flexible...

EWRB EXAM QUESTIONS 63 AND ANSWERS WITH COMPLETE SOLUTIONS LATEST UPDATE In New Zealand, the standard distribution system has the neutral conductor connected to the earth at the main switchboard on all low voltage installations. What name is given to this type of system? Multiple Earthed Neutral or MEN system. State the test voltage used for carrying out an insulation resistance test on three-phase, 400V, electrical equipment incorporating MIMS elements. 500v dc State one reason why the r...

EWRB THEORY PREP - MCBS EXAM QUESTIONS WITH ANSWERS 100% GUARANTEED PASS LATEST UPDATE types of MCB trips thermal magnetic thermal tripping bi-metal strip, used for overload currents protection magnetic tripping magnetic inductor, used for short circuit protection reset procedure reset to OFF reset to ON arc containment includes horns carry current to chute, allow arc to jump out arc chute lengthens distance for arc to travel oil suppresses arc splitter plates split the arc arc c...

EWRB EXAMS QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED GRADED A++ Question 1: A new flexible chord has been fitted, which of the following insolation resistance test values would be correct? A. 10 MOhm B. 0.5 Ohm C. 0.5 MOhm D. 1. Ohm A. 10 MOhm Question 2: The maximum current a flexible cord can carry safely without overheating depends mainly on: A. The type of supply, a.c. or d.c. B. The cross-sectional area of the flexible cord conductors. C. The colours of the flex...